Hydrometer



FIG. 1 is an enlarged perspective view of the hydrometer showing our new design as viewed from the upper left hand side thereof;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevaation view from the right side of FIG. 3;

FIG. 6 is a side elevation view from the left side of FIG. 3; and,

FIG. 7 is a rear elevation view thereof. 

The ornamental design for a hydrometer, as shown and described. 